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NEW YORK - The United States returned to Mongolia more than 18 dinosaur skeletons and fossils stolen from the Gobi desert and smuggled abroad, saying they were enough to stock a museum. The haul includes skeletons of two Tyrannosaurus bataars, a cousin of the fearsome Tyrannosaurus rex, and two Oviraptors, known at least apocryphally for eating other dinosaur eggs. The repatriation ceremony was the culmination of a two-year effort to return numerous dinosaur fossils smuggled to the United States and other countries. Some were illegally smuggled into the US using false customs papers and others were voluntarily forfeited by a British collector to the United States for return to...

Meet the "Chicken from Hell," a recently identified bird-like dinosaur that roamed the Dakotas with T. rex 66 million years ago. Credit: Associated Press The beaked dinosaur, Anzu wyliei, is described in the latest issue of the journal PLoS ONE. The dino was tall, measured 11.5 feet long, weighed 500 pounds and had very sharp claws. RELATED: Dinosaur Feathers Found in Amber "It was a giant raptor, but with a chicken-like head and presumably feathers," co-author Emma Schachner of the University of Utah, said in a press release. "The animal stood about 10 feet tall, so it would be scary as well as absurd to encounter." Lead author Matt Lamanna of the Carnegie Museum of Natural History...

T. Rex Had a Small, Cute Cousin

Toothy Tyrannosaurus rex had a tiny cousin, suggests new research. The dwarf dino, named Nanuqsaurus hoglundi, lived 70 million years ago in Alaska, according to a new study, published in the journal PLOS ONE. Tyrannosaurus rex bones on display at the Perot Museum. Credit: AP The skull for the newly identified dinosaur measured 25 inches long, compared to 60 inches for T. rex. The new dino was a tyrannosaur though, conclude researchers Anthony Fiorillo and Ronald S. Tykoski from the Perot Museum of Nature and Science and their colleagues. RELATED: Could These 10 Animals Be Resurrected? Tyrannosaurs marched around on two legs, loved meat and had a large skull relative to the size of...

A new dinosaur from Portugal is Europe's largest-ever terrestrial predator and was the biggest carnivorous dinosaur of the Jurassic Period, according to paleontologists who studied its remains. Credit: Getty Creative The dinosaur, named Torvosaurus gurneyi, measured close to 33 feet long and weighed over 2,200 pounds, according to a paper in the latest PLoS ONE. The predator was at the top of Europe's terrestrial food chain roughly 150 million years ago. RELATED: Oldest Dinosaur Nursery Found "The fauna of what is now Portugal was extremely diverse in the Late Jurassic," paleontologist Octavio Mateus of the Universidade Nova de Lisboa, and co-author of the study, said in a press release....

Monitor lizards breathe by taking in air that flows through their lungs in a one-way loop - a pattern of breathing that may have originated 270 million years ago in the ancestral group that gave rise to dinosaurs, and eventually alligators and birds, a new study finds. Credit: Thinkstock Researchers at the University of Utah, in Salt Lake City, and Harvard University, in Cambridge, Mass., studied unidirectional breathing in monitor lizards, which can be found throughout Africa, China, India and other parts of Southeast Asia. Their findings suggest one-way airflow breathing may have evolved earlier than scientists had thought. The researchers examined lungs from living and deceased monitor...

Fossil of Tyrannosaurus vs. Triceratops Could Sell for $10M at Auction

A 68-million-year-old fossil of a Tyrannosaurus engaged in combat with a Triceratops is expected to sell for a record-breaking $10 million at auction, according to the Daily Mail U.K. The remains of both creatures are said to be among the most complete and best-preserved ever found, and one of the most important dinosaur…